Parallel Inverters Control Based on Dual Second-Order Generalized Integrators Virtual Impedance

doi:10.11930/j.issn.1004-9649.2016.09.152.08

Abstract

Abstract: The virtual impedance control is widely employed in parallel inverters control. However, voltage drop introduced by controller is not desirable. Also, virtual impedance is usually implemented as time derivative of inverters output current, which makes system highly sensitive to output current noise and nonlinear loads. A dual second-order general-integrator(DSOGI) scheme is proposed for virtual impedance implementation, which avoids to perform the time derivation function and is less sensitive to the output current and nonlinear loads. The proposed scheme has ability to suppress output current noise, and reduce effect of nonlinear loads on the system. It can also reduce voltage drop and improve system power quality. Simulation on parallel inverters system control proves the effectiveness of DSOGI based virtual impedance.

Key words: virtual impedance control, dual second-order general integrator (DSOGI), nonlinear load, parallel inverters system

CLC Number:

TM715

PENG Chunhua, XIONG Xin, PAN Lei, HUANG Zhimin. Parallel Inverters Control Based on Dual Second-Order Generalized Integrators Virtual Impedance[J]. Electric Power, 2016, 49(9): 152-159.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2016.09.152.08

https://www.electricpower.com.cn/EN/Y2016/V49/I9/152

References

[1] 鲁宗相,王彩霞,闵勇,等. 微电网研究综述[J]. 电力系统自动化,2007,31（19）：100-107.
LU Zongxiang, WANG Caixia, MIN Yong, et al . Overview on microgrid research[J]. Automation of Electric Power System, 2007, 31(19): 25-34.
[2] 周洁,罗安,陈燕东,等. 低压微电网多逆变器并联下的电压不平衡补偿方法[J]. 电网技术,2014,38（2）：412-418.
ZHOU Jie, LUO An, CHEN Yandong, et al . Voltage unbalance compensation for low-voltage microgrid with multi parallelly connected inverters[J]. Power System Technology, 2014, 38(2): 412-418.
[3] 黄秀琼,全雯琳,刘宪明,等. 多状态自适应微电网协调控制器的设计与开发[J]. 中国电力,2014,47（5）：118-122.
HUANG Xiuqiong, QUAN Wenlin, LIU Xianming, et al . Design of coordinated controller for micro-grid based on multi-mode self- adjustment strategy [J]. Electric Power, 2014, 47(5): 118-122.
[4] 黄秀琼,赵敏,黄少伟,等. 《微电网接入10 kV及以下配电网技术规范》广西地方标准研究[J]. 中国电力,2013,46（8）：11-15.
HUANG Xiuqiong, ZHAO Min, HUANG Shaowei, et al . Studies on Guangxi provincial standard for microgrid——technical guide for interconnecting microgrids with distribution systems with voltages of 10 kV and below [J]. Electric Power, 2013, 46(8): 11-15.
[5] 赵杰,王硕,沈大力,等. 基于多种分布式电源的微电网控制策略与仿真[J]. 中国电力,2013,46（7）：105-110.
ZHAO Jie, WANG Shuo, SHEN Dali, et al . Control and simulation of a microgrid with different types of distributed generators [J].Electric Power, 2013, 46(7): 105-110.
[6] GUERRERO J M, VICUNA L G, MATAS J, et al . Output impedance design of parallel-connected UPS inverters with wireless load sharing control[J]. IEEE Trans on Industrial Electronics, 2005, 52(4): 1126-1135.
[7] YAO Wei, CHEN Min, MATAS J, et al . Design and analysis of the droop control method for parallel inverters considering the impact of the complex impedance on the power sharing[J]. IEEE Trans on Industrial Electronics, 2011, 58(2): 576-587.
[8] 李军,杨志超,陈凡. S形下垂控制方法在微电网对等控制中的应用[J]. 中国电力,2014,47（12）：88-94.
LI Jun, YANG Zhichao, CHEN Fan. Application of S-shaped droop control method in peer to peer control of microgrids[J].Electric Power, 2014, 47(12): 88-94.
[9] 程军照,李澍森,吴在军,等. 微电网下垂控制中虚拟电抗的功率耦合机理分析[J]. 电力系统自动化,2012,36（7）：27-32.
CHENG Junzhao, LI Shusen, WU Zaijun, et al . Analysis of power decoupling mechanism for droop control with virtual inductance in microgrid[J]. Automation of Electric Power Systems, 2012, 36(7): 27-32.
[10] 荆龙,黄杏,吴学智. 改进型微源下垂控制策略研究[J]. 电工技术学报,2014,29（2）：146-152.
JING Long, HUANG Xing, WU Xuezhi. Research on improved microsource droop control method[J]. Transactions of China Electrotechnical Society, 2014, 29(2): 146-152.
[11] 朱永兴. 虚拟负阻抗在微网下垂控制中的应用[J]. 电力系统及其自动化学报,2014,26（3）：67-71.
ZHU Yongxing. Application of virtual negative resistance on microgrid droop control[J]. Proceeding of the CSU-EPSA, 2014, 26(3): 67-71.
[12] 张平,石健将,李荣贵,等. 低压微网逆变器的“虚拟负阻抗”控制策略[J]. 中国电机工程学报,2014,34（12）：1845-1852.
ZHANG Ping, SHI Jianjiang, LI Ronggui, et al . A control strategy of ‘virtual negative’ impedance for inverters in low- voltage microgrid[J]. Proceedings of the CSEE, 2014, 34(12): 1845-1852.
[13] 董颖华,黄晶生,刘美茵. 光伏逆变器辐射噪声诊断与抑制方法[J]. 电力电子技术,2013,47（1）：49-51.
DONG Yinghua, HUANG Jingsheng, LIU Meiyin. Radiated EMI noise diagnosis and suppression in photovoltaic inverter [J]. Power Electronics, 2013, 47(1): 49-51.
[14] 章勇高,李洋,康淦明,等. 一种新型单相三开关光伏并网逆变器研究[J]. 华东交通大学学报,2014,31（4）：114-118.
ZHANG Yonggao, LI Yang, KANG Ganming, et al . Study on novel single-phase photovoltaic grid-connected inverter with three switching devices[J]. Journal of East China Jiaotong University, 2014, 31(4): 114-118.
[15] 袁义生,张育源,周盼,等. 抑制两级式逆变器中间母线电压二次纹波的方法[J]. 华东交通大学学报,2015,32（6）：93-99.
YUAN Yisheng, ZHANG Yuyuan, ZHOU Pan, et al . A technique for the secondary ripple reduction of the bus voltage in two-stage DC-AC inverter[J]. Journal of East China Jiaotong University, 2015, 32(6): 93-99.
[16] 王正仕,林金燕,陈辉民,等. 不平衡非线性负载下分布式供电逆变器的控制[J]. 电力系统自动化,2008,32（1）：48-51.
WANG Zhengshi, LIN Jinyan, CHEN Huimin, et al . Control of distributed power inverter with unbalanced and nonlinear loads[J]. Automation of Electric Power Systems, 2008, 32(1): 48-51.
[17] 辛振,赵仁德,郭宝玲,等. 基于二阶广义积分器-锁频环的异步电机同步角频率估计方法[J]. 电工技术学报,2014,29（1）：116-122.
XIN Zhen, ZHAO Rende, GUO Baoling, et al . New induction motor synchronous angluar frequency estimation method based on second order generalized integrator-frequency locked loop[J]. Transactions of China Electrotechnical Society, 2014, 29(1): 116-122.
[18] 邵振华,陈冲,林瑞全. 基于复合二阶广义积分的频率自适应谐波电流检测[J]. 电力自动化设备,2012,32（6）：51-55,65.
SHAO Zhenhua, CHEN Chong, LIN Ruiquan. Harmonic current detection with adaptive frequency tracking based on multiple second-order generalized integrators [J]. Electric Power Automation Equipment, 2012, 32(6): 51-55, 65.
[19] 孔飞飞,袁铁江,晁勤,等. 基于二阶广义积分的变流器电网同步法[J]. 电力系统保护与控制,2012,40（12）：116-120.
KONG Feifei, YUAN Tiejiang, CHAO Qin, et al . A method of converter power grid synchronization based on second-order generalized integral[J]. Power System Protection and Control, 2012, 40(12): 116-120.
[20] 刘森森,杭丽君,姚文熙,等. 电网故障时电力电子变流器的直接解耦同步法[J]. 中国电机工程学报,2011,31（21）：32-39.
LIU Sensen, HANG Lijun, YAO Wenxi, et al . Direct decoupled synchronization method for power electronic converters under unbalanced and distorted operation conditions[J]. Proceeding of the CSEE, 2011, 31(21): 32-39.
[21] GUERRERO J M, VICUNA L G, MATAS J, et al . Wireless- control strategy for parallel operation of distributed generation inverters[J]. IEEE Trans on Industrial Electronics, 2006, 53(5): 1461-1470.
[22] 郭小强,邬伟扬,赵清林,等. 三相并网逆变器比例复数积分电流控制技术[J]. 中国电机工程学报,2009,29（15）：8-14.
GUO Xiaoqiang, WU Weiyang, ZHAO Qinglin, et al . Current regulation for three-phase grid-connected inverters based on proportional complex integral control [J]. Proceeding of the CSEE, 2009, 29(15): 8-14.
[23] 彭春华,王立娜,李云丰. 低压微电网三相逆变器功率耦合下垂控制策略[J]. 电力自动化设备,2014,34（3）：28-33,46.
PENG Chunhua, WANG Lina, LI Yunfeng. Strategy of power- coupling droop control for three-phase inverter in low-voltage microgrid [J]. Electric Power Automation Equipment, 2014, 34(3): 28-33, 46.
[24] GUERRERO J M, VICUNA L G, MATAS J, et al . Decentralized control for parallel operation of distributed generation inverters using resistive output impedance[J]. IEEE Trans on Industrial Electronics, 2007, 54(2): 994-10004.
[25] MATAS J, CASTILLA M, de VICUNA L G, et al . Virtual impedance loop for droop-controlled single-phase parallel inverters using a second-order general-integrator scheme [J]. IEEE Trans on Power Electronics, 2010, 25(12): 2993-3002.